Saw-set



Patented Dec. 20, I898. C. BRANDELL.

N0. Ell-3,398.

SAW SET.

(Application filed June so, 1895.;

(No Model.)

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ma "dams mzks co. mroumm. msumavan u c lJNrTnn STATES PATENT OFFICE.

GLAUS BRANDELL, OF CHICAGO, ILLINOIS;

SAW-S ET.

SPECIFICATION forming part of Letters Patent No. 616,398, dated December 20, 1898.

Application filed June 30, 189 8.

To (all whom it 1mm concern:

Be it known that LCLAUs BRANDELL,a subject of the King of Sweden and Norway, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Saw-Sets; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a saw-set, and is designed by an arrangement of opposing jaws and punch blocks or irons to operate upon adjoining teeth to bend or set the same simultaneously in opposite directions for giving the desired set thereto, thereby facilitating the operation as compared with saw sets which operate upon the teeth singly or one at a time, first operating upon the alternate teeth from one side and afterward upon the remaining teeth from the opposite side of the saw.

The construction of the saw-set by which the result indicated is attained will be understood from the following description an d claims.

In the accompanying drawings, Figure l is a perspective view of the improved saw-set. Fig. 2 represents a longitudinal section through the same, showing the shank of the movable jaw and the lever for actuating the same and the punch blocks in side elevation. Fig. 3 is a plan view. Fig. 4 is a detail perspective view of the divided yoke for adjusting the angle of the punch-blocks and adjusting-screw therefor. Fig. 5 is a similar view of the gage-yoke and its adjusting-screw. Fig. 6 is a detail perspective view of one of the punch-blocks.

Like reference-numerals used in the several figures indicate the same parts.

1 indicates what for the purpose of distinction is termed the fixed jaw, and 2 the movable jaw thereof. The fixed jaw is rigid on the outer end of a bifurcated arch or gooseneck, the arms of which are indicated at 3 3 and which at their inner ends terminate in a handle 4, longitudinally grooved on its inner face to receive the shank 5 of the movable jaw and permit a sliding movement of said shank. The handle 4 is provided at the sides of the groove with perforated lugs Serial No. 684,850. (No model.)

or ears 6, in which is a lever-handle 7, pivoted at 8, said lever being provided with a pendent lug or spur 9, which engages the rear end of the shank 5 for actuating it and the movable jaw.

10 indicates an angle-iron plate secured to the lower face of the shank 5 by a set-screw 11 or other suitable fastening, the pendent spur 9 on the lever 7 extending down between the end of the shank .5 and an upright flange 12 on the inner end of the plate 10, thereby adapting it to move the shank 5 in opposite directions. If preferred, the shank 5 maybe extended and provided with a notch for engaging the spur 9. A U-shaped strap-spring l3 is interposed between and-secured to one of the handles 4 and 7 for holding them normally separated, with the jaw 2 removed from the fixed jaw 1.

14 indicates a headed pin or screw passing through a slot 15 in the handle 4 and into the shank 5 for holding the latter snugly down in its groove, while at the same time permitting its longitudinal movement in said groove.

The jaws 1 and 2 are provided with 0bliquely-arranged sockets for the reception of angular set or punch blocks 16 16, made tapering to the knife-edge at their lower free ends and provided in their'angular heel extensions or punching portions proper with slots 17 through which pins 18 extend, pivoting one to the fixed and the other to the movable jaw and adapting them to move or slide thereon. These sWaging-irons are arranged at opposite angles, as indicated in Figs. 2 and 3, in such manner that the opposing angles of the blocks (indicated at 19) will pass one by the other to act simultaneously upon adjacent teeth from opposite sides for bending or set ting them in opposite directions. The irons are cut away on their adjacent faces, as indicated at 20, to give to the operating angles the proper shape to conform to the saw-teeth to be operated upon. The heel ends of these blocks are provided with angular rods 21, which extend in opposite directions and pass through slots 22 in a gage-yoke 23. The form of this yoke is shown in the detail view Fig.

ends with parallel lugs engaging a set-screw 24, which passes through a threaded perforation in the handle 4 and serves by its adj ust- 5, the yoke part proper being provided at its ment to bring the gage-arms 25 nearer to or to remove them farther from the space between the fixed and movable jaws for determining the relation of the saw-set to the teeth to be operated upon. These gage-arms 25 are arranged in alinement and are upon opposite sides of the jaws, as indicated.

26 and 26 indicate the two parts of a divided yoke, (shown in detail in Fig. 4,) each provided at its lower end with a plate 27 27, arranged one to move in a groove in the outer face of the fixed jaw and the other in the corresponding groove in the outer face of the movable jaw. The upper ends of these parts 26 26 of the divided yoke, striding the jaws of the saw-set, are bent inward toward each other in parallel planes, and the part 26 is provided with a pendent loop 28, within which the inturned arm 29 of the opposing part of the yoke is adapted to slide to conform to the relative movements of the jaws with which they are respectively connected. The part 26 is provided with a screw 30, extending through a threaded perforation (indicated at 31) in a lug or arm 32 of the fixed jaw. The part 26 of the yoke is slotted at 33 for adapting it to be adjustably secured to the outer face of the movable jaw by a set-screw, the part 26 being secured to the fixed jaw by the screw 30, passing through the perforation in the lug 32 therein, as described. The screw 30 is connected to the yoke 26 26 in such manner that the latter shall move with or be adjusted by it upon the jaws of the saw-set and is provided, as is the screw 24, with a milled head or thumb-piece 34 for effecting its adjustment. By the adjustment of the screw 30, and therewith of the plates 27, the latter will be drawn under the beveled ends of the punch-blocks or moved outward for varying the angle of said blocks, according to the set it is desired to give to the teeth of the saw, and both being adjusted simultaneously it will be seen that the adjoining teeth will be set or bent in opposite directions and equally upon opposite sides of the saw.

By the adjustment of the plates 27 any desired angle of adjustment may be given to the punch-blocks. Theangular stems 21 of the punch-blocks, as stated, pass through slots 22 in the arms of the saw-gage yoke 23, said slots permitting the movement of the stems 21 rela tive to the yoke when the movable jaw is adj usted relatively to the fixed jaw, while at the same time the punch-blocks are held in operative position by means of the engagement of said stems with the arms of the yoke-gage.

The operation of the saw-set will be apparent from the foregoing description. By the construction of the device as described the teeth of a saw can be readily set, the alternate teeth being bent in opposite directions simultaneously, and by operating the saw-set from one side only of the saw, while the latter is conveniently held by any suitable means for the purpose. The operation of setting the teeth of the saw is thereby greatly facilitated and is accomplished, as will be readily understood, without the turning of the saw or without operating from opposite sides thereof.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is

1. The combination in a saw-set with the fixed and movable jaws thereof, of the punchblocks having a sliding pivotal connection one with the fixed and one with the movable jaw, and means for adjusting the angles of said punch-blocks, for the purpose and substantially as described. 7

2. In a saw-set, the combination with the fixed and movable jaws thereof, of the pivoted punch-blocks and the divided yoke, the parts thereof having a sliding connection one with the other and adj ustably secured to the fixed and movable jaws, substantially as and for the purpose described.

3. In a saw-set, the combination with the V fixed and movable jaws thereof, of the angular punch-blocks pivotally connected with said jaws and provided each with an angular stem, the saw-gage yoke adj nstably secured to the fixed jaw and provided with slotted arms engaging said angular punch block stems, substantially as described.

4. In a saw-set, the opposing angular punchblocks seated in sockets in the opposing jaws and provided with tapering pendent extensions, in combination with adjustable slides operating on said extensions for adjusting the angles of the punch-blocks.

5. The combination in a saw-set with the opposing jaws thereof, of the opposing punchblocks having a sliding pivotal connection with said jaws, means for adjusting the angles of said blocks, and means for adjusting the gage or depth of penetration of the saw-,

teeth between said blocks,substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

OLAUS BRANDELL.

Vitnesses:

JOHN BRANDELL, W. S. DAVIS. 

